expire

# File activerecord/lib/active_record/connection_adapters/abstract_adapter.rb, line 334
      def expire
        if in_use?
          if @owner != ActiveSupport::IsolatedExecutionState.context
            raise ActiveRecordError, "Cannot expire connection, "                "it is owned by a different thread: #{@owner}. "                "Current thread: #{ActiveSupport::IsolatedExecutionState.context}."
          end

          @idle_since = Process.clock_gettime(Process::CLOCK_MONOTONIC)
          @owner = nil
        else
          raise ActiveRecordError, "Cannot expire connection, it is not currently leased."
        end
      end